Add enrich-companies as open-source alternative to Clearbit/ZoomInfo

[Alessandro114]

Summary

Adds enrich-companies to the list under a new Data Enrichment category.

enrich-companies is an open-source CLI tool that enriches CSV files with company data — financials, contacts, and metadata — sourced from 250M+ company records. It serves as a self-hosted, free alternative to proprietary data enrichment services like Clearbit and ZoomInfo.

Why it qualifies

• Open-source repo: https://github.com/Alessandro114/enrich-companies
• Clear proprietary competitors: Clearbit (now part of HubSpot) and ZoomInfo, which charge $99-999+/month for similar company data enrichment
• Solves the same business problem: enriching leads/contacts/company lists with firmographic and financial data for sales, marketing, and research workflows

Changes

• Added one new row to the startup table in README.md
• Created a new "Data Enrichment" category (alphabetically placed between Cybersecurity and Design)
• Followed existing formatting conventions (stars badge, competitor links, description style)